This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between Jannuary 2011 and December 2011 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).